Wrench.



A. LIESE.

WRENCH.

APPLICATION FILED APR. 16, 1914.

1,127,786'. Patented Feb. 9, 1915.

S #SM 50.

UNTED @AE ATER' @FFME AUGUSTUS LIESE, OF SOUTH LANCASTER, MASSACHUSETTS.

WRENCH Specification of Letters Patent.

Patented Feb. 9, i915.

Applicationeled April 16, 1914. Serial No. 832,363.

T0 aZZ whom it may concern.'

Be it known that l., AUGUSTUS Lrnsn, a citizen of the United States, residing at South Lancaster, in the county of Worcester and State of Massachusetts, have. invented a new and useful Wrench, of which the following is a specication.

rllhis invention relates to a wrench of that type in which a head is provided having one fixed jaw at one edge thereof and a movable transverse jaw slidably mounted on the head to coperate with the fixed jaw, a handle being provided and extending' out of thehead at the other side for reciprocating the movable jaw. As heretofore construct ed as far as I am aware, wrenches of this type have been so made that the two iaws would not close together fully and the handie has necessarily been pivoted to the head. This pivoted connection of the handle has always resulted in giving a comparatively short leverage for the size of the head and thus a comparatively small amplitude of motion, while the pressure has been transmitted from the handle to the -iaw through pivot pins and the like. Moreover there has been no way of setting the movable iaw into position against the nut or bolt head except by swinging the handle on its pivot. This invention is desimed to do away with these diiliculties. present a more simple, practicable and eiiicient article of this general type, and especially to provide for transmitting the pressure by an internal part of the handle so that the pivot pins do not receive or transmit any pressure.

Reference is to be had to the accompanying drawings in which- Figure 1 is a plan of a wrench constructed in accordance with this invention showing the jaws open: Fig. 2 is a similar view with the Vfront of the head removedand showing the handle in position to place the movable jaw against a nut: Fig. 8 is a similar view partly in section showing how pressure is transmitted to the sliding jaw from the handle, and Fig. 4 is a sectional view on the line 4--4 of Fig. l.

This wrench is illustrated as comprising three main parts. a headA, a slide B and a handle C. the latter being connected with the slide by a link D. The head is shown as consisting of a casting cored out so as to provide a large hollow space for receiving the end of the handle and the slide. This head is provided with an integral stationary f therethrough.

'grooves b by which it is guided in the guides a. It is provided with a passage b2 therethrough and in this passage the link D is pivoted. The other end of the link extends out through the edge of the slide and is pivoted by a pin E to the handle. This pivot pin is located substantially in the plane of one edge of the slide. In the end of the slide is a notch' b3 having edges b4 transverse to the direction of the motion of the movable jaw. The handle is provided with a pair of slanting surfaces c with their ends almost at right angles to each other., designed to engage the surfaces b4 as the handle is swung. At the ends of these surfaces are rectangular notches c2 which receive the corners of these surfaces in the extreme positions of the handle.V The handle extends through an elongated opening in the end of the head A and has free plav therein.

In the operation of the device the jaws are opened bv swinging the handle in one direction and then the fixed jaw is put against the side of a nut or bolt head. The movable jaw can then be moved along hv the handle so as to bring it into contact with the opposite side of the nut. (Compare Figs. l and 2). It will be noticed that in accomplishing this motion the handle can be moved along by a parallel motion without swinging it on any pivot. In this way the jaw can be brought up firmly against the bolt head before any pressure is applied. Now in order to apply pressure the handle is swung to the right into the position shown in Fig. 3 where its edge comes against the edge o5 of the opening and that surface acts as its pivot or fulcrum. In this way it will be seen that this fulcrum is removed as far as possible from the jaw and consequently a comparatively great amplitude of motion is secured. At the same time there is no pivot pin on which the pressure comes and no weak point that is likely to break away in practice. Particular attention is directed also to the way in which the motion is transmitted positively from the end of the lever to the movable jaw thus securing a very effective leverage. lI do not depend upon the link D for transmitting this motion, thefunction` of this link being merely to hold the jaw and handle together against.

forming the edges of the notch inithe inov able' javv. l This shows clearlyin Fig. 3. In this AWay it Will be seen that azgreat leverage f issecured, practicallythe entire length of .the headibeing takenup bythe short arm of the lever. Thenotches c2 forreceiving the` edges of the Walls @tot the passage b2 also ,act as positiverstopsat: the ends of the motion'ot'fthe-movable jaw.

Although yIha've illustrated'and described onlya single `,embodiment of the invention,

I am aware ofthe fact that modifications can be .made Athereinvlby. -any person` skilled in the art without departing fromthe scope of the invention as set'y forth in theclaims. lTherefore I1 do notlxvish .to be limited to all the details of constructionherein shown but What I do claim is@ 1. In a Wrench, the combination with a head having a fixed jaw thereon and a transverse guide and a movable .jaw slidable along said guide, of a handle projectinginto said head ,pivotally' connected.` with the ymovable jaw, said' head having an .elongatedE slot 'through .which the handle projects, the edges of said .slot constituting rulcrumsy :tor the handle.` .Y

2. Ina Wrench,the combination Withahead havingl a` fixed jaW.-thereon,fand a movable jaw slidably mounted in the head, saidhead being provided with an opening in thevend opposite saidfjanis, of ahandle ffreelymov- .Copies patentfmay'be obtanedfor ing `said front and rear surfaces and positively pushing the jaw in either direction.

4. In a Wrench, the combination with a slidable jaw, having a notch in one Vedge thereof provided Withy front and rear surfaces substantially,perpendicular to the directionof motion 'of the slidable jaw, oi" a handle pivotally connected with said movable jaw and having an end projecting into saidnotch, said handle having two end surfaces atl an angle to each other for engaging said 'front and rearsurfaces and posi-v tively pushing the jaw in either direction, .the point of pivotal connection of the handle `Withthe jaw'be'ing substantiallyy on the line of the edge thereof, saidhandle having 'notches beyond saidsurfaces Vfor receiving the edges of thefnotch.A o

- In" testimony whereof I have hereunto set ymy hand, in the presence of two subscribing Witnesses. L

, AUGUSTUS LIESE. lVtnesses 1 PATRICK F. CANNON, JOHN OCONNELL.

ve cents each, by addressing the cmmirssionerof patents, Washington, D. C. 1 I 

